Week 6: The Sensory Systems

Question 1

Types of Receptors

Answer 1

Mechanoreceptors
Thermoreceptors
Noicoreceptors
Photoreceptors
Chemoreceptors

Question 2

Mechanoreceptors

Answer 2

Detect stimuli related to touch, pressure, vibration, proprioception, hearing, equillibirium, blood pressure.
Distortion of shape of mechanoreceptor cell and plasma membrane

Question 3

Thermoreceptors

Answer 3

Changes in temp.

Question 4

Photoreceptors

Answer 4

Detect light on retina of eye

Question 5

Noicireceptors

Answer 5

Pain

Question 6

Chemoreceptors

Answer 6

Sense chemicals (taste, smell, chemicals in bodily fluids)

Question 7

Cutaneous Sensor

Answer 7

Sensory receptor found in dermis or epidermis

Question 8

Proprioceptors

Answer 8

Sensory receptor that responds to movement and position.
Found in muscles, tendons, skin.

Question 9

Olfactory Receptors

Answer 9

Nasal epithelium
Olfactory cells
Bipolar neurons

Question 10

Olfactory Stimuli

Answer 10

Volatile, water and fat soluble.

Question 11

Supporting cells of the Olfactory

Answer 11

Columnar epithelium cells of mucous membrane

Question 12

Where do impulses from the Olfactory tract go?

Answer 12

Temporal lobe of cerebral cortex.
Only sensory that does not go through thalamus.

Question 13

Hyposmia

Answer 13

Reduced ability to smell.
Free nerve endings - damaged over time.

Question 14

Gustatory Receptor Location

Answer 14

Taste buds on the tongue, soft palate and pharynx.
In elevated papillae

Question 15

Salty Taste

Answer 15

Sodium ions through sodium channels

Question 16

Sour Taste

Answer 16

Hydrogen ions through hydrogen channels

Question 17

Sweet, Bitter, Umami Taste

Answer 17

Fit into receptors.

Question 18

Path of taste impulses

Answer 18

Medulla, thalamus, parietal lobe.